Ultrasonographic fetal weight estimation: accuracy of formulas and accuracy of examiners by birth weight from 500 to 5000 g

2004 ◽  
Vol 32 (2) ◽  
Author(s):  
J. Kurmanavicius ◽  
T. Burkhardt ◽  
J. Wisser ◽  
R. Huch
Keyword(s):  
Birth Weight ◽  
Fetal Weight ◽  
Estimation Accuracy ◽  
Weight Estimation ◽  
Fetal Weight Estimation

Discrepancy Analysis between Clinical Versus Ultrasound Estimated Fetal Weight and Actual Birth Weight at 3rd Trimester

2019 ◽  
Vol 11 (1) ◽  
pp. 32-38
Author(s):  
Naznin Rashid Shewly ◽  
Menoka Ferdous ◽  
Hasina Begum ◽  
Shahadat Hossain Khan ◽  
Sheema Rani Debee ◽  
...  
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Fetal Weight ◽  
P Value ◽  
Weight Estimation ◽  
Third Trimester ◽  
Mortality And Morbidity ◽  
Fetal Weight Estimation ◽  
Obstetric Management ◽  
Estimated Fetal Weight

Background: In obstetric management fetal weight estimation is an important consideration when planning the mode of delivery in our day to day practice. In Bangladesh low birth weight is a major public health problem & incidence is 38% - 58%. Neonatal mortality and morbidity also yet high. So accurate antenatal estimation of fetal weight is a good way to detect macrosomia or small for date baby. Thus to improve the pregnancy outcome and neonatal outcome decreasing various chance of neonatal mortality and morbidity antenatal fetal weight prediction is an invaluable parameter in some situation where to identify the at risk pregnancy for low birth weight become necessary. Reliable method for prenatal estimation of fetal weight two modalities have got popularity - Clinical estimation and another one is ultrasonic estimation. This study was designed to determine the accuracy of clinical versus ultrasound estimated fetal weight detecting the discrepancy with actual birth weight at third trimester. So that we can verify more reliable and accurate method. Objectives: To find out more accurate and reliable modality of fetal weight estimation in antenatal period during obstetric management planning. To compare clinical versus ultrasound estimated fetal weight & to determine discrepancy of both variable with actual birth weight. Method: This prospective, cross sectional analytical study was carried out in Dhaka Medical College Hospital from January 2006 to December 2006. By purposive sampling 100 pregnant women fulfilling inclusion criteria were included in my study in third trimester (29wks-40wks). In clinical weight estimation procedure SFH (Symphysio Fundal Height) was measured in centimeter. On pervaginal finding whether vertex below or above the ischial spine was determined. By Johnson’s formula fetal weight in grams was estimated. Then by ultrasound scan different biometric measurements were taken and finally by Hadlock’s formula fetal weight was estimated. Eventually actual birth weight was taken after birth by Globe Brand weighing machine. Accuracy of both modalities were compared and which one was more reliable predictor was determined by statistical analysis. Results: After data collection were analyzed by computer based software (SPSS). There was gradual and positive relationship between symphysiofundal height and estimated birth weight. Discrepancy between clinical and actual birth weight at third trimester was statistically significant – Paired Student’s ‘t’ test was done where p value was <0.001. Whereas discrepancy between sonographically estimated fetal weight with actual birth weight was not statistically significant (by paired ‘t’ test where p value was >0.05). That implies discrepancy between ultrasound estimated fetal weight and actual birth weight was significantly less than that of clinically estimated fetal weight. 14% clinically and 46% sonographically estimated fetal weight were observed within £ 5% of actual birth weight. 31% clinical and 42% sonographically estimates observed within 6% to 10% of actual birth weight and 55% clinical and 12% sonographically estimate were >10% of actual birth weight. That is about 88% sonographical versus 45% clinical estimates were within 10% of actual birth weight. Conclusion: There is no doubt about importance of fetal weight in many obstetric situations. Clinical decisions at times depends on fetal weight. Whether to use oxytocin, to use forceps or vacuum for delivery or extend of trial or ended by Caesarian section immediately or no scope of trial to be largely depend on fetal size and weight. So more accurate modality for antenatal fetal weight estimation has paramount importance. In my study sonographically estimated weight have more accuracy than that of clinical estimate in predicting actual birth weight. Sonographically estimated fetal weight is more reliable, accurate and reproducible rather than other modality. J Shaheed Suhrawardy Med Coll, June 2019, Vol.11(1); 32-38

scholarly journals Differences in Biometric Fetal Weight Estimation Accuracy and Doppler Examination Results in Uncomplicated Term Singleton Pregnancies between Vertex and Breech Presentation

2021 ◽  
Vol 10 (15) ◽  
pp. 3252
Author(s):  
Lukas Jennewein ◽  
Simon Theissen ◽  
Hemma Roswitha Pfeifenberger ◽  
Nadja Zander ◽  
Kyra Fischer ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Umbilical Artery ◽  
Breech Presentation ◽  
Fetal Weight ◽  
Estimation Accuracy ◽  
Weight Estimation ◽  
Fetal Weight Estimation ◽  
Presentation Group ◽  
Chi2 Test

Doppler examination of the umbilical artery and the fetal middle cerebral artery is evaluated predominantly in pregnancies with fetuses in cephalic presentation and never has been elucidated in breech presentation. Evidence on the accuracy of fetal weight estimation in dependence of the fetal presentation is controversial. Nevertheless, clinical decisions including recommendations for a cesarean section or labor induction based on these examinations are applied to pregnancies with fetuses in breech presentation. The objective of this study was to investigate the influence of the fetal presentation on fetal weight estimation accuracy, umbilical artery and middle cerebral artery resistance indices (RI) in a prospective case control study. Ultrasound examinations in 305 uncomplicated term pregnancies (153 vertex presentations, 152 breech) were investigated. Non-parametric variables were compared using Pearson’s chi2 test and Wilcoxon chi2 test, depending on variable scaling. Fetal weight estimation accuracy was not significantly different between vertex presentation group (VP) (6.97%) and breech presentation group (BP) (7.96%, p = 0.099). Fetal head circumference measurements were significantly larger in BP (350 mm vs. 341 mm in VB, p > 0.0001) while abdominal circumferences were significantly smaller (VP: 338 mm, BP: 331 mm, p = 0.0039) and weight estimation was not significantly different. Umbilical artery RIs were not significantly different between VP (54.5) and BP (55.3, p = 0.354). Fetal middle cerebral artery RIs also showed no significant differences (VP: 71.2, BP: 70.7, p = 0.335). Our study shows that fetal Doppler (RI) and weight estimation ultrasound originally calibrated in cephalic pregnancies are applicable to pregnancies with fetuses in breech presentation.

scholarly journals Accuracy of ultrasonic fetal weight estimation using head and abdominal circumference and femur length

2005 ◽  
Vol 58 (11-12) ◽  
pp. 548-552 ◽  
Author(s):  
Ljiljana Mladenovic-Segedi ◽  
Dimitrije Segedi
Keyword(s):  
Birth Weight ◽  
Head Circumference ◽  
Fetal Weight ◽  
Abdominal Circumference ◽  
Weight Estimation ◽  
Fetal Head ◽  
Total Body Mass ◽  
Femur Length ◽  
Fetal Weight Estimation ◽  
Gynecology And Obstetrics

Introduction Former investigations have shown that the accuracy of fetal weight estimation is significantly higher if several ultrasonic fe?tal parameters are measured, because the total body mass depends on the size of fetal head, abdominal circumference and femur length. The aim of this investigation was to establish the best regression model, that is a number of combinations of fetal parameters providing the most accurate fetal weight estimation in utero in our population. Material and methods This prospective study was carried out at the Gynecology and Obstetrics Clinic of the Clinical Center Novi Sad. It included 270 pregnant women with singleton pregnancies within 72 hours of delivery who underwent ultrasound measurements of the biparietal diameter (BPD), head circumference (HC), ab?dominal circumference (AC) and femur length (FL). Results In regard to fetal weight estimation formulas, the deviation was lowest using regression models that simultaneously analyzed four fetal parameters (0.55%) with SD ?7.61%. In these models the estimates of fetal weights were within ?5% of actual birth weight in 48.89%, and within ?10% of actual birth weight in 81.48%. Good results were also obtained using AC, FL measurements (0.92% ? 8.20) as well as using AC, HC, FL measurements (-1.45% ? 7.81). In our sample the combination of AC and FL model gave better results in fetal weight estimation (0.92 ? 8.20%) than the one using BPD and AC (2.97 ? 8.83%). Furthermore, the model using parameters AC, HC and FL showed a lower error in accuracy (-1.45 ? 7.81%) than the model using BPD, AC and FL (2.51 ? 7.82%). Conclusion This investigation has confirmed that the accuracy of fetal weight estimation increases with the number of measured ultra?sonic fetal parameters. In our population the greatest accuracy was obtained using BPD, HC, AC and FL model. In cases when fast estimation of fetal weight is needed, AC, HC, FL model may be appropriate, but if fetal head circumference cannot be measured (amnion rupture and/or fetal head already in the pelvis) the AC, FL model should be used.

scholarly journals INTEGRATION OF FETAL MID THIGH SOFT TISSUE THICKNESS IN ULTRASOUND BIRTH WEIGHT ESTIMATION FORMULA INCREASES THE ACCURACY OF FETAL WEIGHT ESTIMATION NEAR TERM

2018 ◽  
Vol 11 (4) ◽  
pp. 446
Author(s):  
Shripad Hebbar ◽  
Sukriti Malaviya ◽  
Sunanda Bharatnur
Keyword(s):  
Birth Weight ◽  
Prediction Models ◽  
Fetal Weight ◽  
Abdominal Circumference ◽  
Estimation Methods ◽  
Weight Estimation ◽  
Singleton Pregnancy ◽  
Fetal Biometry ◽  
Fetal Weight Estimation ◽  
Soft Tissue Thickness

Objective: The objective of the study was to find whether incorporation of MTSTT in fetal weight estimation formulae which are traditionally based on biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL) improves birth weight (BW) estimation. Methods: In a prospective observational study, MTSTT was measured within 1 week of delivery in 100 women with term singleton pregnancy along with other standard biometric parameters, i.e. BPD, HC, AC and FL, and MTSTT. Multiple regression analysis was carried out using PHOEBE regression software using different combinations of biometric variables to find out the best fit model of fetal weight estimation. The predicted BW was compared with actual neonatal BW soon after delivery and regression coefficients (R2) were determined for each of prediction models for comparing the accuracies. Results: Mean gestational age at delivery was 38.4±1.08 weeks and the BW of neonates varied between 2.18 kg and 4.38 kg (mean ± standard deviation: 3.07±0.43 kg). By adding MTSTT to BPD, HC, AC, and FL, we obtained the formula Log 10 (BW) = −0.14783+0.00725 *BPD +0.00043 *HC +0.00436 *AC +0.01942 *FL +0.16299 *MTSTT, which had a very good Pearson regression coefficient ((r2: 0.89 p<0.001) compared to conventional models based on standard fetal biometry. All prediction models had better strength of correlation when combined with MTSTT (p<0.001). The routine four parameter formula could identify 45% and 80% of fetuses within 5% and 10% weight range; pick up rate was further increased to 61% and 95% by addition of MTSTT. Conclusion: It is evident that addition of MTSTT to other biometric variables in models of fetal weight estimation improves neonatal BW prediction (r2=0.89).

Accuracy of sonographic fetal weight estimation of fetuses with a birth weight of 1500g or less

2010 ◽  
Vol 153 (2) ◽  
pp. 131-137 ◽  
Author(s):  
Harald Abele ◽  
Markus Hoopmann ◽  
Norbert Wagner ◽  
Markus Hahn ◽  
Diethelm Wallwiener ◽  
...  
Keyword(s):  
Birth Weight ◽  
Fetal Weight ◽  
Weight Estimation ◽  
Fetal Weight Estimation

scholarly journals ACCURACY OF ULTRASOUND VERSUS CLINICAL FETAL WEIGHT ESTIMATION AT TERM WITH ACTUAL BIRTH WEIGHT IN KENYATTA NATIONAL HOSPITAL

2017 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Dr. Daniel K. Wanjaria ◽  
Prof. Koigi Kamau
Keyword(s):  
Birth Weight ◽  
Fetal Weight ◽  
Ultra Sound ◽  
Categorical Variables ◽  
Weight Estimation ◽  
National Hospital ◽  
Actual Weight ◽  
Kenyatta National Hospital ◽  
Fetal Weight Estimation ◽  
Clinical Methods

Purpose: The purpose of this study was to correlate fetal weight estimation by ultrasound and clinical methods with actual birth weight in KNH.Methodology: This is a prospective comparative study. The design was suitable because it enabled comparison of the predictive value, sensitivity and specificity in estimating fetal weight which is known after birth. Study area was KNH Obstetric wards. The study population was all pregnant women admitted to obstetric wards for elective caesarean delivery and study period was February -March 2016. Data was analysed using SPSS version 20. Categorical variables were presented as proportions in tables and graphs, bars or pie charts). Continuous variable were summarized as means or medians and presented in table form.Results: The findings show that the correlation between actual weight and Ultra Sound estimated weight was significant (r=0.65, p<0.000). The findings further showed that the proportion of Ultra Sound methods estimations within 10% of the actual birth weight was 44% of the overall weights. Clinical methods estimations within 10% of the actual birth weight were 47% of the overall weights. The mean difference between actual birth weights and ultra sound estimated weights were statistically insignificantThe findings revealed that the correlation between actual weight and clinical methods estimated weight was stronger (r=0.79, p<0.000) as compared to the correlation between actual weight and Ultra Sound estimated weight (r=0.65, p<0.000).Unique contribution to theory, practice and policy: The finding of this study may influence further studies and decision on estimation of fetal weight. If clinical estimation is equal or same as ultrasound estimation then it can be recommended that all mothers undergo this instead of ultrasound for estimation of fetal weight. The results may be shared with the University of Nairobi, Kenyatta National Hospital and the Ministry of Health and any policy change resulting from this can be rolled down to counties.

scholarly journals Sonographic Versus Clinical Fetal Weight Estimation Accuracy

2018 ◽  
Vol 2 (1) ◽  
pp. 01-05
Author(s):  
Amr abd el Fattah El Helali ◽  
Amal el Shabrawi El Sayed ◽  
Wesal Hamdi Ali Hassan
Keyword(s):  
Fetal Weight ◽  
Estimation Accuracy ◽  
Weight Estimation ◽  
Altman Plot ◽  
Care Clinic ◽  
Clinical Method ◽  
Fetal Weight Estimation ◽  
Plot Analysis ◽  
Ultrasound Assessment ◽  
Sensitivity Specificity

Background: Sonographic fetal weight estimation is an important component of antenatal care. It was found to be more reliable method to establish fetal weight at term and more consistent in various period of gestations. Aim of study: to compare clinical and sonographic methods for assessment of fetal weight regarding sensitivity, specificity and accuracy. Subjects and Methods: The study recruited 100 women scheduled for delivery from ante-natal care clinic with 38 weeks or more of gestation. Fetal weight was assed clinically and by ultrasound. Both techniques were compared and analyzed. Results: Ultrasound assessment of fetal weight showed better performance than the clinical method regarding absolute errors and error percentages. Ultrasound assessment showed better sensitivity and specificity in detecting fetal weight > 3500 gm. Moreover, it showed less bias on Bland–Altman plot analysis. Conclusions: Ultrasound assessment of fetal weight is safe, reliable and sensitive method of fetal weight estimation.

scholarly journals Factors Affecting Ultrasonographic Fetal Weight Estimation Accuracy in Low Birth Weight Newborns

2021 ◽  
Author(s):  
Nevin Tuten ◽  
Onur Guralp ◽  
Koray Gok ◽  
Abdullah Tuten ◽  
Altay Gezer
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Gestational Age ◽  
Fetal Weight ◽  
Accurate Estimation ◽  
Weight Estimation ◽  
Factors Affecting ◽  
Fetal Weight Estimation ◽  
Gestational Age At Birth ◽  
Age At Birth

Objective: To investigate the accuracy of fetal weight estimation made by the last prenatal ultrasound measurement in low birth weight newborns (<2500 g). Study Design: A total of 1082 women were evaluated in this retrospective cohort study. Demographic and clinical information of the mother and newborn and obstetric ultrasonography measurements and findings performed in the last week before birth were recorded. Accuracy of fetal weight estimation and parameters affecting it was investigated. Results: Accurate estimation rates were lower in the term compared to the preterm delivery group; and in the SGA group compared to the AGA group (respectively, p=0.016, p=0.032). Accurate estimation rates (p=0.182) were comparable between the 500-1500 g and 1501-2500 g subgroups. The multiple linear regression analysis showed that gestational age at birth, birth weight, examination during labor, and duration between examination to delivery were statistically significant for the accurate estimation(p=0.001) Conclusions: Accurate estimation rates were lower in the term compared to the preterm delivery group, and in the SGA group compared to the AGA group. The factors affecting accurate estimation were found to be gestational age at birth, birth weight, examination during labor, and duration between examination to delivery.Keywords: Accurate estimation rate, Duration between examination to delivery, Examination during

scholarly journals The Accuracy of the Weight of the Fetal Agency Using Ultrasound Based on the Formula Hadlock Compared to the Birth of New Body Weight

2019 ◽  
Author(s):  
Nurbaiti . ◽  
Sri Haryati Gofar ◽  
Samsun . ◽  
Guntur Winarno ◽  
Akhmadi .
Keyword(s):  
Body Weight ◽  
Birth Weight ◽  
T Test ◽  
Fetal Weight ◽  
Weight Estimation ◽  
Fetal Weight Estimation ◽  
Significant Difference ◽  
Fetal Birth Weight ◽  
Estimated Fetal Weight

The purpose of this study is to analyze the result of the calculation of fetal weight estimation based on Hadlock’s formula with baby birth weight. The design of this research is quantitative analytic. The data is analyzed by the t-test. The results of this study showed that the analysis of the average comparison between TBJ (Fetal Weight Estimation) and BBL (Fetal Birth Weight) is 2623,60 with 2946,67. There is a significant difference with the value of sig.(2-tailed) 0,000 <0,05, which means there is a significant difference between the estimated fetal weight based on Hadlock’s formula with baby birth weight. Based on the result of the study of fetal weight interpretation using Hadlock’s formula, an accuracy of 89,34% was seen.

A Comparative Study of Fetal Weight Estimation Using Ultrasound and Johnson’s Formula and its Correlation with Actual Birth Weight

2012 ◽  
Vol 3 (2) ◽  
pp. 389-390
Author(s):  
Dr.Kavitha.b Dr.Kavitha.b ◽  
◽  
Dr.G.C.Prabhakar Dr.G.C.Prabhakar ◽  
Dr. Shaivalini.k Dr. Shaivalini.k ◽  
Dr.Suprada.k Dr.Suprada.k
Keyword(s):  
Birth Weight ◽  
Comparative Study ◽  
Fetal Weight ◽  
Weight Estimation ◽  
Fetal Weight Estimation
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